1.iOS开发中有的时候需要引导用户打开某个权限
//音乐设置界面
NSURL *url = [NSURL URLWithString:@"prefs:root=MUSIC"];
[[UIApplication sharedApplication] openURL:url];
//墙纸设置界面
NSURL *url = [NSURL URLWithString:@"prefs:root=Wallpaper"];
//蓝牙设置界面
NSURL *url = [NSURL URLWithString:@"prefs:root=Bluetooth"];
//iCloud设置界面
NSURL *url = [NSURL URLWithString:@"prefs:root=CASTLE"];
//更多
About — prefs:root=General&path=About
Accessibility — prefs:root=General&path=ACCESSIBILITY
Airplane Mode On — prefs:root=AIRPLANE_MODE
Auto-Lock — prefs:root=General&path=AUTOLOCK
Brightness — prefs:root=Brightness
Bluetooth — prefs:root=General&path=Bluetooth
Date & Time — prefs:root=General&path=DATE_AND_TIME
FaceTime — prefs:root=FACETIME
General — prefs:root=General
Keyboard — prefs:root=General&path=Keyboard
iCloud — prefs:root=CASTLE
iCloud Storage & Backup — prefs:root=CASTLE&path=STORAGE_AND_BACKUP
International — prefs:root=General&path=INTERNATIONAL
Location Services — prefs:root=LOCATION_SERVICES
Music — prefs:root=MUSIC
Music Equalizer — prefs:root=MUSIC&path=EQ
Music Volume Limit — prefs:root=MUSIC&path=VolumeLimit
Network — prefs:root=General&path=Network
Nike + iPod — prefs:root=NIKE_PLUS_IPOD
Notes — prefs:root=NOTES
Notification — prefs:root=NOTIFICATIONS_ID
Phone — prefs:root=Phone
Photos — prefs:root=Photos
Profile — prefs:root=General&path=ManagedConfigurationList
Reset — prefs:root=General&path=Reset
Safari — prefs:root=Safari
Siri — prefs:root=General&path=Assistant
Sounds — prefs:root=Sounds
Software Update — prefs:root=General&path=SOFTWARE_UPDATE_LINK
Store — prefs:root=STORE
Twitter — prefs:root=TWITTER
Usage — prefs:root=General&path=USAGE
VPN — prefs:root=General&path=Network/VPN
Wallpaper — prefs:root=Wallpaper
Wi-Fi — prefs:root=WIFI
2. 应用间相互跳转简介
在iOS开发的过程中，我们经常会遇到需要从一个应用程序A跳转到另一个应用程序B的场景。这就需要我们掌握iOS应用程序之间的相互跳转知识。iOS9之后，应用间跳转需要在Info.plsit中设置白名单。以‘LSApplicationQueriesSchemes’为Key值，对应数组value中添加白名单应用的URL Schemes即可。若未设置白名单，会报错，值得我们注意。
原理：通过设置跳转到应用B的URL Schemes（自定义的协议头），应用B将其自身“绑定”到一个自定义URL Schemes上，就可以从应用A中利用应用B的URL Schemes启动应用B了。
设置App-B的URL Schemes
选择项目App-B -> TARGETS -> Info -> URL Types -> URL Schemes，设置App-B的URL Schemes为AppB。
// 1.获取应用程序App-B的URL Scheme
NSURL *appBUrl = [NSURL URLWithString:@"AppB://"];
// 2.判断手机中是否安装了对应程序
if ([[UIApplication sharedApplication] canOpenURL:appBUrl]) {
// 3. 打开应用程序App-B
[[UIApplication sharedApplication] openURL:appBUrl];
} else {
NSLog(@"没有安装");
}
